TPS or IAC for bucking engine
03-17-2014, 09:40 AM
#1
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Year: 89
Model: Cherokee
TPS or IAC for bucking engine
88 4.0 auto likes to buck alittle at 30 mph,I did all the ground replacing etc.from the list of fixes posted on here but still bucking,tranny nice and clean and at the proper level.Which one to buy or could they both cause this problem
03-19-2014, 10:05 AM
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Year: 1993
Model: Grand Cherokee
Engine: 4.0L Laredo
Idle Air Control valve is more likely to affect your jeep at idle.. TPS would be a more likely fix and they're pretty easy to test with an analog volt/ohm meter. If it seems to be 'searching' for the right gear more than 'bucking', i'd check/adjust the TV cable. Engine off, press the adjuster button and push the cable housing all the way back into the adjuster housing. Release the button and open the throttle to wide open. You should hear the adjuster 'ratchet' as it self adjusts. Test drive.
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